<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>learn react</title>
    <script src="js/react.js"></script>
    <script src="js/react-dom.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js"></script>
  </head>
  <body>
    <div id="example"></div>
    <script type="text/babel">
    /*
      样式
     */
      var Hello = React.createClass({
        getInitialState: function() {
          return {
            opacity: 1.0
          }
        },

        componentDidMount: function() {
          this.timer = setInterval(function(){
            var opacity = this.state.opacity
            opacity -= .05
            if (opacity < 0.1) {
              opacity = 1.0
            }
            this.setState({
              opacity: opacity
            })
          }.bind(this),100)
        },

        render: function() {
          return (
            <div style={{opacity: this.state.opacity}}>
              Hello {this.props.name}
            </div>
          )
        }
      })
      ReactDOM.render(
        <Hello  name="World"/>,
        document.getElementById('example')
      )
    </script>
  </body>
</html>
